Pentagon Details How Bunker-Buster Bombs Hit Iran’s Fordow Nuclear Site

Fordow, which is underground a mountain range, was one of the three nuclear sites bombed by the United States on June 21.

Chairman of the Joint Chiefs of Staff Air Force Gen. Dan Caine (2nd-L), accompanied by Defense Secretary Pete Hegseth (L), speaks during a news conference at the Pentagon in Arlington, Va., on June 26, 2025. Andrew Harnik/Getty Images

The Pentagon has revealed details on how it bombed Iran’s Fordow nuclear site, in a June 26 press conference.

Fordow, which is housed under a mountain, was one of the three nuclear sites bombed by the United States on June 21.

“If you want to know what’s going on at Fordow, you better go there and get a big shovel because no one’s under there right now,” said Defense Secretary Pete Hegseth at the briefing.

U.S. B-2 bombers dropped six massive ordinance penetrators (MOPs) on Fordow. The first uncovered the main shaft, while the next four entered the main shaft, moved down into the facility, and let off explosions. The sixth MOP was a flex bomb, in case one of the bombs did not do its job.

“The weapons were released on speed and on parameters,” said Joint Chiefs Chairman Dan Caine. “The weapons all guided to their intended targets and to their intended aim points.”

The bombs, he said, ripped through Fordow’s open tunnels and destroyed critical hardware.

“The majority of the damage we assessed, based on our extensive modeling, was a blast layer combined with the impulse extending from the shock,” said Caine.

Caine did not say what the damage was, as damage assessments are done not by the Pentagon but rather by the intelligence community.

CNN first reported on June 24 that the strikes on Iran did not destroy the country’s nuclear program “and likely only set it back by months,” citing an assessment from anonymous sources of the Defense Intelligence Agency (DIA) whose conclusion was one of low confidence.

The report also said that “Iran’s stockpile of enriched uranium was not destroyed” and that “the intelligence assessed enriched uranium was moved out of the sites, prior to the U.S. strikes.”

Pentagon displays a board showing the U.S. strike operation at Fordow Fuel Enrichment Plant at a press conference on June 26, 2025. Ryan Morgan/The Epoch Times

During the press conference, Hegseth emphasized that the report was “preliminary.” He cited numerous primary sources, such as U.S. and Israeli intelligence, stating that the strikes destroyed Iran’s nuclear sites at Fordow, Natanz, and Esfahan.

President Donald Trump has criticized the DIA report.

“Great statements just came out from the Israeli Atomic Energy Commission and from Iran, as you know, that it was complete, total destruction,” Trump said on June 25.

“And, CNN turned out to be fake news. As always. I swear they have no credibility. That’s why they have no viewers. But we’re going to read it to you if you haven’t seen it.”

CNN has stood by its reporting.

“We stand 100 percent behind Natasha Bertrand’s journalism and specifically her and her colleagues’ reporting of the early intelligence assessment of the U.S. attack on Iran’s nuclear facilities. CNN’s reporting made clear that this was an initial finding that could change with additional intelligence. We have extensively covered President Trump’s own deep skepticism about it,” the network said in a statement.

“However, we do not believe it is reasonable to criticize CNN reporters for accurately reporting the existence of the assessment and accurately characterizing its findings, which are in the public interest.”